Same trader, same 1,000 USDT, three different position sizes: how BloFin's Smart Copy, Fixed Amount and Fixed Ratio set your margin per order

Most people pick a lead trader on BloFin by ROI and never touch the copy mode. That is backwards: the copy mode decides how big every copied order is, and two people copying the same trader with the same balance can end up with very different positions.

The attached image is official BloFin Academy art for its copy trading guide: three stacked tiles, a BloFin logo tile on top, a glowing orange copier icon in the middle and a base layer below, on a black background.

Q: What are the copy modes?

Three: Smart Copy, Fixed Amount and Fixed Ratio. Copiers do not need to apply, and you can copy up to 10 traders at one time. Copy trading runs out of a separate Copy Trading account; funds are moved in automatically from Funding, Spot or Futures, and go back to Funding automatically when you stop copying.

Q: How does each mode size my margin?

• Smart Copy: you set one total investment. Margin per order = trader's position margin / trader's copy account balance x your copy account balance. Allocation, leverage and margin mode follow the lead trader.
• Fixed Amount: every copied order uses the same margin you set (cost per order), inside a total investment cap.
• Fixed Ratio: margin per order = multiplier x lead trader's order value / your futures leverage.

Q: What does that look like with real numbers?

Example: the lead trader has 10,000 USDT in the copy account and opens an ETH perp with 500 USDT margin at 10x, so 5,000 USDT order value. You have 1,000 USDT in your copy account.

• Smart Copy: 500 / 10,000 x 1,000 = 50 USDT margin. You mirror the trader's 5% allocation.
• Fixed Amount at 20 USDT per order: 20 USDT margin, whatever the trader sizes.
• Fixed Ratio, multiplier 0.1, your leverage 10x: 0.1 x 5,000 / 10 = 50 USDT margin. Same multiplier at 5x: 0.1 x 5,000 / 5 = 100 USDT margin. Both are a 500 USDT position; lower leverage just ties up more margin.

The formulas do not care whether the trader is in BTC, ETH, SOL, XRP or DOGE perps. The mode is what sets your size.

Q: How much control do I keep?

In all three modes you can set TP/SL per order in advance, pick margin mode (copy the trader's, cross or isolated) and choose the trader's leverage or a fixed one. Smart Copy also has Copy Immediately, which opens your copy at the market price regardless of the trader's open price. The exception is SyncMaster: when a lead trader turns it on (Smart Copy only), leverage, margin mode and TP/SL are locked to the trader's settings.

Q: When does a copied position close?

When the lead trader closes, your copy closes too. You can close manually any time. And the system closes a copy position when its unrealized loss is greater than the available assets in your copy trading account, so an underfunded copy account is a liquidation risk, not just a small one.

Q: How does profit sharing work?

Lead traders get up to 20% of copiers' net profit, default 10%. The cycle runs Monday 0:00 UTC to Sunday 23:59:59 UTC and pays every Monday at 3:00 AM UTC. Daily advances are deducted and any excess is refunded at settlement, net-loss weeks pay nothing, and a contract only settles once all positions in it are closed. Example: your copied trades net 200 USDT for the week at the default 10%, so 20 USDT goes to the lead trader and you keep 180 USDT.

BloFin's own guide adds a warning worth repeating: a 90% win rate with large losses on the other 10% can still lose money overall.

If you copy on BloFin, which mode do you run, and did you pick it on purpose or just leave the default?

$BTC.USDT $ETH.USDT $SOL.USDT $XRP.USDT $DOGE.USDT